Doing a kindness produces the single most reliable momentary increase in well-being of any exercise we have tested.

Curing the negatives does not produce the positives.

You go into flow when your highest strengths are deployed to meet the highest challenges that come your way.

One of the things psychologists used to say was that if you are depressed, anxious or angry, you couldn't be happy. Those were at opposite ends of a continuum. I believe that you can be suffering or have a mental illness and be happy - just not in the same moment that you're sad.

On the relationship side, if you teach people to respond actively and constructively when someone they care about has a victory, it increases love and friendship and decreases the probability of depression.

Optimism is a tool with a certain clear set of benefits: it fights depression, it promotes achievement and produces better health.

When well-being comes from engaging our strengths and virtues, our lives are imbued with authenticity.